1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
|
package org.javacs;
import com.sun.source.tree.*;
import com.sun.source.util.*;
import java.io.IOException;
import java.net.URI;
import java.util.*;
import java.util.logging.Logger;
import javax.lang.model.element.*;
public class CompileFile implements AutoCloseable {
private final JavaCompilerService parent;
public final URI file;
public final String contents;
private final TaskPool.Borrow borrow;
private final Trees trees;
public final CompilationUnitTree root;
CompileFile(JavaCompilerService parent, URI file) {
this.parent = parent;
this.file = file;
this.contents = FileStore.contents(file);
this.borrow = CompileFocus.singleFileTask(parent, file, contents);
this.trees = Trees.instance(borrow.task);
var profiler = new Profiler();
borrow.task.addTaskListener(profiler);
try {
this.root = borrow.task.parse().iterator().next();
// The results of borrow.task.analyze() are unreliable when errors are present
// You can get at `Element` values using `Trees`
borrow.task.analyze();
} catch (IOException e) {
throw new RuntimeException(e);
}
profiler.print();
}
@Override
public void close() {
borrow.close();
}
public SourcePositions sourcePositions() {
return trees.getSourcePositions();
}
/**
* Find all elements in `file` that get turned into code-lenses. This needs to match the result of
* `ParseFile#declarations`
*/
public List<Element> declarations() {
var paths = ParseFile.declarations(root);
var els = new ArrayList<Element>();
for (var p : paths) {
var e = trees.getElement(p);
assert e != null;
els.add(e);
}
return els;
}
public Index index(List<Element> declarations) {
return new Index(borrow.task, root, parent.diags, declarations);
}
public Optional<Element> element(int line, int character) {
// LOG.info(String.format("Looking for element at %s(%d,%d)...", file.getPath(), line, character));
// First, look for a tree path
var path = CompileFocus.findPath(borrow.task, root, line, character);
if (path == null) {
// LOG.info("...found nothing");
return Optional.empty();
}
// LOG.info(String.format("...found tree `%s`", Parser.describeTree(path.getLeaf())));
// Then, convert the path to an element
var el = trees.getElement(path);
if (el == null) {
// LOG.info(String.format("...tree does not correspond to an element"));
return Optional.empty();
}
return Optional.of(el);
}
private List<Element> overrides(ExecutableElement method) {
var elements = borrow.task.getElements();
var types = borrow.task.getTypes();
var results = new ArrayList<Element>();
var enclosingClass = (TypeElement) method.getEnclosingElement();
var enclosingType = enclosingClass.asType();
for (var superClass : types.directSupertypes(enclosingType)) {
var e = (TypeElement) types.asElement(superClass);
for (var other : e.getEnclosedElements()) {
if (!(other instanceof ExecutableElement)) continue;
if (elements.overrides(method, (ExecutableElement) other, enclosingClass)) {
results.add(other);
}
}
}
return results;
}
private boolean hasOverrideAnnotation(ExecutableElement method) {
for (var ann : method.getAnnotationMirrors()) {
var type = ann.getAnnotationType();
var el = type.asElement();
var name = el.toString();
if (name.equals("java.lang.Override")) {
return true;
}
}
return false;
}
/** Find methods that override a method from a superclass but don't have an @Override annotation. */
public List<TreePath> needsOverrideAnnotation() {
LOG.info(String.format("Looking for methods that need an @Override annotation in %s ...", file.getPath()));
var results = new ArrayList<TreePath>();
class FindMissingOverride extends TreePathScanner<Void, Void> {
@Override
public Void visitMethod(MethodTree t, Void __) {
var method = (ExecutableElement) trees.getElement(getCurrentPath());
var supers = overrides(method);
if (!supers.isEmpty() && !hasOverrideAnnotation(method)) {
var overridesMethod = supers.get(0);
var overridesClass = overridesMethod.getEnclosingElement();
LOG.info(
String.format(
"...`%s` has no @Override annotation but overrides `%s.%s`",
method, overridesClass, overridesMethod));
results.add(getCurrentPath());
}
return super.visitMethod(t, null);
}
}
new FindMissingOverride().scan(root, null);
return results;
}
/**
* Figure out what imports this file should have. Star-imports like `import java.util.*` are converted to individual
* class imports. Missing imports are inferred by looking at imports in other source files.
*/
public List<String> fixImports() {
// Check diagnostics for missing imports
var unresolved = new HashSet<String>();
for (var d : parent.diags) {
if (d.getCode().equals("compiler.err.cant.resolve.location") && d.getSource().toUri().equals(file)) {
long start = d.getStartPosition(), end = d.getEndPosition();
var id = contents.substring((int) start, (int) end);
if (id.matches("[A-Z]\\w+")) {
unresolved.add(id);
} else LOG.warning(id + " doesn't look like a class");
} else if (d.getMessage(null).contains("cannot find to")) {
var lines = d.getMessage(null).split("\n");
var firstLine = lines.length > 0 ? lines[0] : "";
LOG.warning(String.format("%s %s doesn't look like to-not-found", d.getCode(), firstLine));
}
}
// Look at imports in other classes to help us guess how to fix imports
// TODO cache parsed imports on a per-file basis
var sourcePathImports = Parser.existingImports(FileStore.all());
var classes = new HashSet<String>();
classes.addAll(parent.jdkClasses);
classes.addAll(parent.classPathClasses);
var fixes = Parser.resolveSymbols(unresolved, sourcePathImports, classes);
// Figure out which existing imports are actually used
var trees = Trees.instance(borrow.task);
var references = new HashSet<String>();
class FindUsedImports extends TreePathScanner<Void, Void> {
@Override
public Void visitIdentifier(IdentifierTree node, Void nothing) {
var e = trees.getElement(getCurrentPath());
if (e instanceof TypeElement) {
var t = (TypeElement) e;
var qualifiedName = t.getQualifiedName().toString();
var lastDot = qualifiedName.lastIndexOf('.');
var packageName = lastDot == -1 ? "" : qualifiedName.substring(0, lastDot);
var thisPackage = Objects.toString(root.getPackageName(), "");
// java.lang.* and current package are imported by default
if (!packageName.equals("java.lang")
&& !packageName.equals(thisPackage)
&& !packageName.equals("")) {
references.add(qualifiedName);
}
}
return null;
}
}
new FindUsedImports().scan(root, null);
// Take the intersection of existing imports ^ existing identifiers
var qualifiedNames = new HashSet<String>();
for (var i : root.getImports()) {
var imported = i.getQualifiedIdentifier().toString();
if (imported.endsWith(".*")) {
var packageName = Parser.mostName(imported);
var isUsed = references.stream().anyMatch(r -> r.startsWith(packageName));
if (isUsed) qualifiedNames.add(imported);
else LOG.warning("There are no references to package " + imported);
} else {
if (references.contains(imported)) qualifiedNames.add(imported);
else LOG.warning("There are no references to class " + imported);
}
}
// Add qualified names from fixes
qualifiedNames.addAll(fixes.values());
// Sort in alphabetical order
var sorted = new ArrayList<String>();
sorted.addAll(qualifiedNames);
Collections.sort(sorted);
return sorted;
}
private static final Logger LOG = Logger.getLogger("main");
}
|
